The threshold ambient temperature for the use of precooling to improve cycling time-trial performance

Faulkner, S.H. ORCID: 0000-0003-4688-7252, Broekhuijzen, I., Raccuglia, M., Hupperets, M., Hodder, S.G. and Havenith, G., 2019. The threshold ambient temperature for the use of precooling to improve cycling time-trial performance. International Journal of Sports Physiology and Performance, 14 (3), pp. 323-330. ISSN 1555-0265

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Abstract

Purpose: Cycling time trial performance can be compromised by moderate to high ambient temperatures. It has become commonplace to implement pre-cooling prior to competition to alleviate this performance decline. However, little is known about the ambient temperature threshold above which pre-cooling becomes an effective strategy for enhancing endurance performance. It was the aim of this study to investigate the effect of pre-cooling in different environmental temperatures on time trial performance.

Methods: Trained cyclists completed two time trials with (COLD) and without (CON) pre-cooling using an ice-vest and sleeves ensemble in ambient temperatures of 24˚C, 27˚C and 35˚C.

Results: Time trial performance faster following COLD in both 35˚C (6.2%) and 27˚C (2.6%; both P<0.05) but not 24˚C (1.2%). Magnitude based inferential statistics indicate that COLD was very likely beneficial to performance in 35˚C and likely beneficial in 27˚C and possibly beneficial in 24°C. Mean power was 2.4%, 2.5% and 5.6% higher following COLD and considered to be likely beneficial in 24°C and very likely beneficial in 27˚C and 35˚C. COLD reduced mean skin temperature throughout the warm-up and into the time trial in all ambient temperatures (P<0.05). Sweat loss was lower following COLD in 24˚C and 27˚C but not 35˚C. There was no effect of COLD on gastrointestinal temperature at any point.

Conclusions: Pre-cooling with an ice-vest and sleeves is likely to have a positive effect on time trial performance at temperatures above 24˚C, with a clear relationship between ambient temperature and the magnitude of effect of pre-cooling

Item Type: Journal article
Alternative Title: Threshold temperature for the use of pre-cooling [running head]
Publication Title: International Journal of Sports Physiology and Performance
Creators: Faulkner, S.H., Broekhuijzen, I., Raccuglia, M., Hupperets, M., Hodder, S.G. and Havenith, G.
Publisher: Human Kinetics, Inc
Date: March 2019
Volume: 14
Number: 3
ISSN: 1555-0265
Identifiers:
NumberType
10.1123/ijspp.2018-0310DOI
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 02 Aug 2018 11:37
Last Modified: 17 Sep 2019 13:49
URI: http://irep.ntu.ac.uk/id/eprint/34229

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